Phthalocyanine Based Anti-Corrosive Materials

Nanofibers possess exclusive physical, chemical, and electronic properties. Although different methods are known [1-2], electrospinning has been used with an increasing impact because of the ease of proceeding and the use of a wide range of polymeric materials [3–4] in the production of nanofibers. This electrostatic technique consists by the propulsion of a polymer solution trough an electrostatic field created by a high voltage applied syringe and an oppositely charged collector where the fibrins are formed. The applied electrical field, the collector distance, and the assets of the polymer solution had an immense effect on physical and morphological properties of the fiber such as the diameter, the surface area per unit mass and the pore size [5].

Because of the thermal, chemical and optical stability and the formation of an aligned crystalline film phthalocyanine derivatives have found applications as photovoltaic cells, solar cells, sensor electrodes, drug release systems, gas detectors and electroactive devices [6-9].

In this work, Metal free phthalocyanine grafted polypyrrole and cobalt metallated phthalocyanine grafted polypyrrole nanofibers were successfully collected onto Staineless Steel SAE 1020 (UNS G10200) by means of electrospinning technique. The anti-corrosion performance of the final system has been evaluated in 3 wt.% NaCl solution by means of Electrochemical Impedance Spectroscopy (EIS) and Tafel measurements. Different methods were used to characterize the obtained fibers. Fourier-transform infrared spectroscopy, Scanning electron microscope and polarized optical microscope were used for their morphological characterization, while electrical behaviors of the nanofibers were characterized by direct current and electrochemical impedance spectroscopy measurements.

[1] Feng L., Li S., Li H., Zhai J., Song Y., Jiang L. Angew Chem Int Ed  2002; 41; 1221–1223.

[2] Ma P.X., Zhang R. J Biomed Mat Res 1999; 46; 60–72.

[3] Menon V. P., Lei, J., Martin, C. R. Chem Mater 1996; 8; 2382-86.

[4] Joo J., Park K.T., Kim B.H., Kim M.S., Lee S. Y., Jeong C. K., Lee J. K., Park D. H., Yi W. K., Lee S. H., Ryu, K. S. Synth Met 2003; 135; 7-13.

[5] Chronakis I.S., Grapenson S., Jakob A. Polymer 2006; 47; 1597–1603.

[6] Li Y., Lu P., Yan X., Jin L., Peng Z. RSC Adv 2013; 3; 545-558.

[7] Lu H.-L., Syu W.-J., Nishiyama N., Kataoka K., Lai P.-S. Journal of Controlled Release 2011;155;458–464.

[8] Jeong S.I., Jun I.D., Choi M.J., Nho Y.C., Lee Y.M., Shin H. Macromol Biosc 2008;8;627–637.

[9] Mugadza T., Nyokong T. Synthetic Metals 2010;160; 2089–2098.